CN102184766A - Low-noise saturable reactor - Google Patents
Low-noise saturable reactor Download PDFInfo
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- CN102184766A CN102184766A CN 201110040955 CN201110040955A CN102184766A CN 102184766 A CN102184766 A CN 102184766A CN 201110040955 CN201110040955 CN 201110040955 CN 201110040955 A CN201110040955 A CN 201110040955A CN 102184766 A CN102184766 A CN 102184766A
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Abstract
The invention relates to a low-noise saturable reactor, which can lower the reactance value of the saturable reactor in saturated state. The low-noise saturable reactor comprises a saturable reactor iron core, wherein a reactance coil L1 and a direct-current coil L2 are arranged on one side of the saturable reactor iron core; a reactance coil L3 and a direct-current coil L4 are arranged on the other side of the saturable reactor iron core; the reactance coil L1 and the reactance coil L3 have the same structure and the same number of turns; the direct-current coil L2 and the direct-current coil L4 have the same structure and the same number of turns; the homonymous end of the reactance coil L1 is connected with the synonymous end of the reactance coil L3 and is taken as an alternating-current terminal I of a saturable reactor alternating-current loop; the synonymous end of the reactance coil L1 is connected with the homonymous end of the reactance coil L3 and is taken as another alternating-current terminal II of the saturable reactor alternating-current loop; the homonymous end of the direct-current coil L2 is connected with the synonymous end of the direct-current coil L4 and is taken as a direct-current terminal I of a saturable reactor direct-current loop; and the synonymous end of the direct-current coil L4 is taken as another direct-current terminal II of the saturable reactor direct-current loop.
Description
Technical field
The present invention relates to electric power system and send the power transformation field, particularly a kind of low noise saturable reactor.
Background technology
Along with the continuous development of electric power system, the continuous rising of generate output, the electric power system short circuit current that causes that is short-circuited is very big.The be short-circuited short circuit current that causes of electric power system is very big to the harm of electric power system.Reduce short circuit current, can make the circuit breaker can cutting-off of short-circuit electric current, reduce the extent of damage of power equipment when short circuit, improve the stability of electric power system.
The method and apparatus of Recent study limiting short-circuit current (also claiming demand limiter) becomes heat subject.
Utilize the saturation characteristic of saturable reactor iron core to constitute demand limiter.Increase by one group of dc coil on the saturable reactor iron core, when electric power system normally moved, DC power supply provided direct current to dc coil, made the iron core degree of depth of saturable reactor saturated.When the iron core degree of depth of saturable reactor was saturated, saturable reactor presented little reactance; The demand limiter that is connected in the transmission line does not influence normal transmission of electricity.When electric power system was short-circuited, control module was cut off the direct current of dc coil, and the iron core of saturable reactor breaks away from saturated; Saturable reactor presents very big reactance.The saturable reactor that is connected in the transmission line provides constraints to short circuit current, reduces short circuit current.
" a kind of saturable reactor short-circuit current limiting device " of the patent No. 2008101604501 and " short-circuit current limiting device and the method " of the patent No. 2008101592788 are one of achievements in research of this respect.Saturable reactor is the nucleus equipment of saturation reactance type demand limiter, also is the most valuable equipment, and its characteristic directly influences the performance index of demand limiter.Patent of invention number is: 2010105840411 " a kind of magnetic saturation reactor " proposed a kind ofly satisfying the volume and the weight that can reduce saturable reactor under the performance requirement condition; Under the magnetic saturation state, can reduce a kind of saturable reactor of the reactance value of saturable reactor.But, the reactance coil series connection of this saturable reactor, higher harmonic current can not circulate, and iron core produces dither, and noise is bigger.In addition, the reactance value that further reduces saturable reactor remains the target of pursuit.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and under the magnetic saturation state, provides voltage waveform better, and the noise that iron core produces is less, the low noise saturable reactor that reactance value is lower under the saturation condition.
For achieving the above object, the present invention adopts following technical scheme:
A kind of low noise saturable reactor, it comprises:
A saturable reactor iron core; Saturable reactor iron core one side is installed reactance coil L1, dc coil L2 respectively; Saturable reactor iron core opposite side is installed corresponding reactance coil L3, dc coil L4 respectively; Reactance coil L1 and reactance coil L3 structure, the number of turn are identical; Dc coil L2 and dc coil L4 structure, the number of turn are identical;
The end of the same name of reactance coil L1 is connected with the different name end of reactance coil L3, simultaneously should end also as one of them ac terminal I of saturable reactor ac circuit; The different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the while is as another ac terminal II of saturable reactor ac circuit;
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L4, and the different name end of dc coil L2 is one of them dc terminal I of saturable reactor DC loop, and the different name end of dc coil L4 is another dc terminal II of saturable reactor DC loop.
A kind of low noise saturable reactor, it comprises:
A saturable reactor iron core; Saturable reactor iron core one side is installed reactance coil L1, dc coil L2 respectively; Installation reactance coil L3, dc coil L4 that saturable reactor iron core opposite side is corresponding respectively; Reactance coil L1 and reactance coil L3 structure, the number of turn are identical; Dc coil L2 and dc coil L4 structure, the number of turn are identical;
The end of the same name of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the while is as one of them ac terminal I of saturable reactor ac circuit; The different name end of reactance coil L1 is connected with the different name end of reactance coil L3, and the while is as another ac terminal II of saturable reactor ac circuit;
The end of the same name of dc coil L2 is connected with the different name end of dc coil L4, the different name end of dc coil L2 is as one of them dc terminal I of saturable reactor DC loop simultaneously, and the end of the same name of dc coil L4 is as another dc terminal II of saturable reactor DC loop.
Described saturable reactor iron core is a day font structure; The sectional area of both sides iron core equates; The sectional area of middle iron core equals the sectional area sum of both sides iron core.
The invention has the beneficial effects as follows: under the magnetic saturation state, the reactance value of saturable reactor is lower.Saturable reactor of the present invention is used for demand limiter, electric power system normally when operation, reduces 50% than the reactance value of " a kind of magnetic saturation reactor " of patent of invention numbers 2010105840411.Reduced the interference of ac circuit, protected the power electronic device in the DC circuit DC loop.Voltage waveform is better, and the noise that iron core produces is less.
Description of drawings
Fig. 1 represents saturable reactor structure and the connected mode that a kind of noise is less;
Fig. 2 represents the saturable reactor connected mode that another kind of noise is less;
Wherein, 1. ac terminal I, 2. ac terminal II, 3. dc terminal I, 4. dc terminal II, 5. saturable reactor iron core.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Embodiment 1:
Saturable reactor structure and connected mode are as shown in Figure 1.Device ac terminal I1 and ac terminal II2 polyphone incoming transport transmitting loop; Device dc terminal I3 and dc terminal II4 polyphone insert direct current power supply loop.
Because the end of the same name of reactance coil L1 is connected with the different name end of reactance coil L3, one of them ac terminal I1 for the saturable reactor ac circuit, the different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, is another ac terminal II2 of saturable reactor ac circuit; Again because reactance coil L1 and reactance coil L3 structure, the number of turn, winding method technological requirement are identical; So, the magnetic flux Φ 2 that the alternating current that magnetic flux Φ 1 and the reactance coil L2 that the alternating current that flows through at reactance coil L1 produces in iron core flows through produces in iron core, equal and opposite in direction, direction all makes progress, exchange flux respectively day type structure both sides iron core upwards, all pass through the middle iron core formation closed-loop path of day font structure.If the dc coil L2 of saturable reactor, dc coil L4 direct current are zero; The saturable reactor iron core breaks away from saturation condition, and the reactance that is connected on reactance coil L1, reactance coil L3 in the transmitting loop is very big.
The end of the same name of dc coil L2 is connected with the different name end of dc coil L4, and the different name end of dc coil L2 is one of them dc terminal I3 of saturable reactor DC loop, and the end of the same name of dc coil L4 is the dc terminal II4 of saturable reactor DC loop.Reactance coil L1 produces the power frequency magnetic flux in the saturable reactor iron core, this power frequency magnetic flux produces induced electromotive force at dc coil L2; Reactance coil L3 produces the power frequency magnetic flux in the saturable reactor iron core, this power frequency magnetic flux produces induced electromotive force at dc coil L4; Because dc coil L2 is identical with the technological requirement of dc coil L4 structure, the number of turn, winding method, the power frequency induced electromotive force of dc coil L2 is kept to zero mutually with the power frequency induced electromotive force of dc coil L4, and the alternating current of reactance coil L1, reactance coil L3 does not exert an influence to DC loop.
When flowing through direct current among dc coil L3, the L4, upwards one downwards for one of the magnetic flux that dc coil L3, L4 produce, and direct current flux forms the magnetic flux closed loop at the both sides iron core; The direct current flux path is shorter than present already used twoport font structure saturable reactor exchange flux path, and core sataration is dark, and is big to the AC coil influence.So when direct current flux made the place core sataration, the iron core column at AC coil place also was saturated simultaneously.The saturable reactor iron core is in saturation condition, and the reactance that is connected on reactance coil L1, reactance coil L3 in the transmitting loop is very little.Reactance coil L1 is in parallel with reactance coil L3, so the reactance value of saturable reactor further reduces 50%.
The AC coil of saturable reactor is wound on the identical iron core column with the dc coil level, has strengthened the magnetic coupling of AC coil and dc coil.
Reactance coil L1 is in parallel with reactance coil L3, and higher harmonic current can form flow cycle in reactance coil L1 and reactance coil L3, make the voltage waveform of saturable reactor better.It is less that iron core produces dither, and the noise that saturable reactor produces is less.
Reactance coil L1 and the same post of dc coil L2, reactance coil L3 and the same post of dc coil L4, if between dc terminal I3 and the dc terminal II4 interference alternating voltage is arranged, will between reactance coil L1 and reactance coil L3, form circulation, force the interference alternating voltage between dc terminal I3 and the dc terminal II4 to descend.Reduced the harm of interference voltage to DC circuit.
Described saturable reactor iron core 5 is a day font structure; The sectional area of both sides iron core equates; The sectional area of middle iron core equals the sectional area sum of both sides iron core.
Embodiment 2:
Fig. 2 represents the saturable reactor connected mode that another kind of noise is less; It comprises a saturable reactor iron core; Saturable reactor iron core one side is installed reactance coil L1, dc coil L2 respectively; Installation reactance coil L3, dc coil L4 that saturable reactor iron core opposite side is corresponding respectively; Reactance coil L1 and reactance coil L3 structure, the number of turn are identical; Dc coil L2 and dc coil L4 structure, the number of turn are identical;
The end of the same name of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the while is as one of them ac terminal I1 of saturable reactor ac circuit; The different name end of reactance coil L1 is connected with the different name end of reactance coil L3, and the while is as another ac terminal II2 of saturable reactor ac circuit;
The end of the same name of dc coil L2 is connected with the different name end of dc coil L4, the different name end of dc coil L2 is as one of them dc terminal I3 of saturable reactor DC loop simultaneously, and the end of the same name of dc coil L4 is as another dc terminal II4 of saturable reactor DC loop.
Saturable reactor characteristics shown in Figure 2 are, direct current flux flows through the iron core magnetic post in the middle of the iron core, and exchange flux only flows at the iron core magnetic post of iron core both sides, do not flow into iron core magnetic post in the middle of the iron core; The exchange flux path is short, the direct current flux path length.A kind of saturable reactor characteristics that Fig. 1 represents are, exchange flux flows through the iron core magnetic post in the middle of the iron core, and direct current flux only flows at the iron core magnetic post of iron core both sides, do not flow into iron core magnetic post in the middle of the iron core; The direct current flux path is short, the exchange flux path length.
The less saturable reactor of noise of the present invention can manufacture and design with prior art, can realize fully.Broad prospect of application is arranged.
Claims (3)
1. low noise saturable reactor is characterized in that it comprises:
A saturable reactor iron core; Saturable reactor iron core one side is installed reactance coil L1, dc coil L2 respectively; Saturable reactor iron core opposite side is installed corresponding reactance coil L3, dc coil L4 respectively; Reactance coil L1 and reactance coil L3 structure, the number of turn are identical; Dc coil L2 and dc coil L4 structure, the number of turn are identical;
The end of the same name of reactance coil L1 is connected with the different name end of reactance coil L3, simultaneously should end also as one of them ac terminal I of saturable reactor ac circuit; The different name end of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the while is as another ac terminal II of saturable reactor ac circuit;
The end of the same name of dc coil L2 is connected with the end of the same name of dc coil L4, and the different name end of dc coil L2 is one of them dc terminal I of saturable reactor DC loop, and the different name end of dc coil L4 is another dc terminal II of saturable reactor DC loop.
2. low noise saturable reactor is characterized in that it comprises:
A saturable reactor iron core; Saturable reactor iron core one side is installed reactance coil L1, dc coil L2 respectively; Installation reactance coil L3, dc coil L4 that saturable reactor iron core opposite side is corresponding respectively; Reactance coil L1 and reactance coil L3 structure, the number of turn are identical; Dc coil L2 and dc coil L4 structure, the number of turn are identical;
The end of the same name of reactance coil L1 is connected with the end of the same name of reactance coil L3, and the while is as one of them ac terminal I of saturable reactor ac circuit; The different name end of reactance coil L1 is connected with the different name end of reactance coil L3, and the while is as another ac terminal II of saturable reactor ac circuit;
The end of the same name of dc coil L2 is connected with the different name end of dc coil L4, the different name end of dc coil L2 is as one of them dc terminal I of saturable reactor DC loop simultaneously, and the end of the same name of dc coil L4 is as another dc terminal II of saturable reactor DC loop.
3. low noise saturable reactor as claimed in claim 1 or 2 is characterized in that, described saturable reactor iron core is a day font structure; The sectional area of both sides iron core equates; The sectional area of middle iron core equals the sectional area sum of both sides iron core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100409556A CN102184766B (en) | 2011-02-21 | 2011-02-21 | Low-noise saturable reactor |
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| CN2011100409556A CN102184766B (en) | 2011-02-21 | 2011-02-21 | Low-noise saturable reactor |
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| CN102184766A true CN102184766A (en) | 2011-09-14 |
| CN102184766B CN102184766B (en) | 2012-11-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100229A (en) * | 1985-01-16 | 1986-07-16 | 海德罗-魁北克公司 | The automatic control variable reactor of band air-gap |
| CN2370541Y (en) * | 1999-01-05 | 2000-03-22 | 冯景榕 | Electric inductance element |
| CN201213086Y (en) * | 2008-04-29 | 2009-03-25 | 特变电工股份有限公司 | Coil construction for reactor |
| US20090231891A1 (en) * | 2008-03-14 | 2009-09-17 | Abb Oy | Reactor arrangement for alternating electrical current |
-
2011
- 2011-02-21 CN CN2011100409556A patent/CN102184766B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100229A (en) * | 1985-01-16 | 1986-07-16 | 海德罗-魁北克公司 | The automatic control variable reactor of band air-gap |
| CN2370541Y (en) * | 1999-01-05 | 2000-03-22 | 冯景榕 | Electric inductance element |
| US20090231891A1 (en) * | 2008-03-14 | 2009-09-17 | Abb Oy | Reactor arrangement for alternating electrical current |
| CN201213086Y (en) * | 2008-04-29 | 2009-03-25 | 特变电工股份有限公司 | Coil construction for reactor |
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| CN102184766B (en) | 2012-11-14 |
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